Edward b



E. B. GARDNER.

' WHEEL DRESSING MEANS FOR GRINDING MACHINES.

APPLICATION FILED FEB. 20. 1919.

1,320,752. Patented Nov. 4, 1919.

2 SHEETS-SHEET 1- E. B. GARDNER. WHEEL DRESSING MEANS FOR GRINDINGMACHINES.

APPLICATION FILED FEB. 20.1919.

Patented NOV-4, 1919. 2 SHEETSSHIZET 2.

IIIIIIIIIIIIIII I EDWARD B. GARDNER, 0F BELOIT, WISCONSIN, ASSIGNOR TOBADGER TOOL COMPANY,

' OF BELOIT, WISCONSIN, A CORPORATION OF WISCONSIN.

WHEEL-DRESSING MEANS FOR GRINDING-MACHINES.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Original application filed- September 21, 1918, Serial No. 255,022.Divided and this application fil ed February 20, 1919., seim No.278,227.

To all whom it may concern:

Be it known that I, EDWARD B. GAR R, a citizen of the United States,residing at Beloit, in the county of Rock and State of Wisconsin, haveinvented certain new and useful Improvements in Wheel- Dressing Meansfor Grinding-Machines, of which the following is a speclfication. I i

This invention relates to the art of grind ing machines, and the generalobject'of the inventidn is to providean improved work table and meansthereon for dressing the grinding wheel.

A special object is to provide a, wheel dressing device which is smalland compact, andtoprovide means for mounting the device on the worktable in such a way that 'the. device may remain on the work table atall times ready for use,and yet will not interfere with the attaching ofthe work to the grinding table or with the grinding operation.

.In theaccompanying drawings Figure 1 is a side elevation view of somuch of a grinding machine as is necessary to an understanding of myinvention. Fig. 2 is a sectional plan view through the work table takenin the plane of line'2T2 of Fig. 3.

Fig. 3 is a rear end elevation of the table with certain stop devicessectioned away. Figs. 4, 5. and 6 are, respectively, a plan view, andinner and outer. side elevations, of the wheel dresser demounted.

The exemplary machine to which I have hereinshown the invention asapplied is of the type known eg a disk or ring wheel grinder. Brieflydescribed, the machine comprises a body, of which a fragment isindicated at 11, and a grinding wheel 12 fixed on the. end of a shaft,not shown, which is revolubly mounted in the body. A bar 13 projectsfrom the body beneath the grindwheel and constitutes the means on whichthe work support asa whole is mounted. A rocker boxld is mounted; on:the bar 13, and has a slot or groove in which anup? right bar. 15 isslidabl -mounted, the bar ii e ng d in di..e nt PQ tionsby means of setscrews 16 to support the work table at dilferent elevations. Acounterweight 17 is fixed to the lower end of a rod l7 which-is fixed toand depends from a sleeve portion of the rocker box 14:.

The work table comprises a base or sup port 18 having a downwardlyextending lug 19 overlapping a portion of the upper end of the bar 15,being pivoted at 20 thereto I and having an arcuate slot 21 throughwhich passes a screw or bolt 22 that is seated in the bar for clampingthe parts together in any desired position of angular adjustment.

The work-table further comprises a table top 23 slidably mounted on thesupport 18 to move toward and away from the grinding wheel 12. Anydesired means may be employed for sliding the table top 23,

that herein shown comprising a shaft 28 having a crank 27 fixed on itsupper end, the free end of which crank is connected by a link 26 to thetable top, said crank and link lying between said top and the support18. On the lower end of the shaft 28 is fixed a hand lever 29. A stopscrew 45 mounted in the table top. 23 is arranged to abut against thebase 18 of the table to, limit the motion of the table top 23 toward thegrinding wheel 12. A rod 46 seated in the base 18 and passing slidablythrough the end'of the table top carries a stop 47'to limit the motionof the table top away from the grindingwheel. This means for sliding thetable top forms the subject matter of my copendingv application forpatent, Serial No. 255,022, filed September 21, 1918, of which thisapplication is a division.

The work to be ground is fixed to the upper face of the table top by anysuitable means such as bolts 24, the heads of which engage in undercutslots 25 in the table top.

The wheel dressing means is mounted on the slidable table top in aposition beneath to a position projecting beyond the fOI-f.

wardend of the table top or a position rearward from such forward end.The piece of tion of dressing work which is secured to the table top bymeans of the bolts 24 isfrequently of such size that it projects beyondthe side edges of the table top and for this reason the wheel dresser isattached beneath the plane of the top face where it will not, at anytime, interfere with the WOIl-T and always be ready for use. 7 q I aWhile the wheel dressing member may be of any one ofthe well-knowntypes, I have herein shown it as consisting of a roller ,to contact withthe grinding wheel,

although it should be understood that the 7 pin or screw 44: seated inthe spaced arms of the bracket. 7 e

The wheel dresser may be mounted in different positions on the table topso long as :11? lskept beneath the plane'of the upper face thereof, butI have found it most con-v Venient to attach the device to one of thevertical side faces of the table top. The preferred manner of attachmentis to provide the table top'with an undercut slot 39, and to providethe'bracket 40 with 'a rib 42 to enter the narrow portion of said slot, thebracket being adjustably attached to the table top by means of a bolt 43passing through a hole in the bracket and having its head engaging inthe wider part of the slot 39, the bolt having a nut on its'outer endfor clamping the bracket in any desired position onthe table top.- I

en. the a grinding wheel 12 is to be dressed the dressing deviceissecured in the position shown in Fig. 2 so that the dresserwheelprojects beyondthe end of the table top. "The hand lever 29 is thenmoved toward the'grinding wheel to press the dresser roller with thedesired degree of force against the grinding wheel. The wheeldressermaybe caused to pass approximately radially across. the face ofthe grinding Wheel by swinging the work table back and I forth on thesupporting bar 13 as an axis, so that all points on the grinding wheelwill be dressed.

When not in use the wheel dresser is secured in a -positionrearwardfromthe front end of the table, in which position the devicewill not, in anyway, interfere with the securing of a piece of work onthe tabletop yet will.

top face.

even though the work project beyond the edges of the table, because thedevice is located beneath the plane of the upper face of the table top28. The wheel dresser is also of small dimensions so that it is not inthe way during the grinding operation.

The particular details ofconstruction of my invention have been hereindescribed for the sake of lucidity only and not with any intention oflimiting the invention to the exact structure disclosed. The scope ofthe invention is pointed out in the appended claims. 4 I, {I claim as myinvention: i1

li A work table for grinding machines equipped with means for securing apiece of work to the top face ofthe table, in combination-with a wheeldresser, and means for adjustably securing said wheel dresser to thework table in a plane beneath said 2. A work table for grinding machinesequipped with means for securing a piece of work to the top 'face 'ofthetable, in com bination with a wheel dresser, and means for adjustablysecuring said wheeldresser to one of table. i V V 3. A work table forgrinding machines equipped with means for securing apiece of work to thetop face of the tableand having a horizontal slot located ina planebeneath said top face, in combination with a,

wheel dresser and means to engage in said the upright side faces of thework slot for securing the wheel dresser to the 7 table, said wheeldresser being adjustable along's aid slot to'project beyond the frontend of the table so as to engage the grinding wheel or to occupy aposition rearward from the front end of the table. 0

4;. Aework table having an undercut slot therein, and a. wheel dresserdevice having a bolt to engage in said slot for clamping the device tothe table,fsaid device lying below the plane of the top of the table; I

'5. A work table having, in combination,

a wheel dresser, and means for adjustably fixing said dresser to oneside of the table.

6. A work table having an undercut slot therein, a bracket carrying awheel dressing roller, means on said bracket engaging said slot topermit sliding of said bracket and prevent rotation thereof, a boltpassing through said bracket and having a head engaging in the undercutportion of the slot, and a nut. on the outer end of said bolt arrangedto clamp said bracket in difierent positions on the table, said bracketand wheel occupying a position beneath the upper face ofthe table. i r7. A worktable having, incombination, a support," a table ,top slidablymounted thereon, means for'moving said.top,.and a wheel dresseradju'stab'ly' fixed to one side of said table top in .a plane beneaththe dresser adjustably mounted on one face of upper face of said top.the table top in such position that it does 8. A Work table having, incombination, not interfere With the clamping of the Work 10 a support, atable top slidably mounted on the table top. 5 thereon, means for movingsaid top, the top In testimony whereof, I have hereunto set having meanson its upper face to permit my hand. of clamping the Work thereto, and.a Wheel EDWARD B. GARDNER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

